The Urban Dictionary T-Shirt

The mexican way to write "lol" if ur trying to fit in wit the ppl around u or want to sound cool on a message or comment then u would write "lolz". This is an incorrect use! U DO NOT "LAUGH OUT LOUDZ" u sound stupid sayin this! SO NEVER "LOLZ"!!!!!

The Urban Dictionary T-Shirt

The high increase in popularity of the infamous LOL (laughing out loud) was not enough for the teenage, trying to be cool, defying mom and dad, often emo generation. They had to come up with something even cooler and that's how LOLZ was born. Some say that Z stands for S, therefore it's the plural version of LOL. But let's analyze that thought process a bit. The plural of LOL would be translated as "laughing out loudS" or "laughingS out loud" which, for the few of us who are at least trying to be grammatically correct makes as much sense as "z" being used as a replacement for "s".
In this case, the Z could be interpreted as the initial of a completely different word. Possibilities:

1. Laughing out loud ZBANG! - this would indicate that the violent laughter has caused the person to fall and hit the ground, thus creating a loud sound;
2. Laughing out loud ZTUPID - seeing as Z is so often used as a replacement for S, it makes sense. It's also a very positive thing, when you consider that admitting you have a problem is the first step to recovery;
3. Laughing out loud ZENITH - the person doing the laughing has entered a state of astral trance...